fix: Add podcast-only demo mode frontend integration

- Skip onboarding in demo mode, redirect to podcast-maker
- Demo mode checks localStorage and env vars
- Remove mock subscription - use real subscription flow

frontend/src/contexts/SubscriptionContext.tsx

@@ -8,7 +8,6 @@ import {
 import SubscriptionExpiredModal from '../components/SubscriptionExpiredModal';
 import { saveNavigationState, getCurrentPhaseForTool } from '../utils/navigationState';
 import { showSubscriptionExpiredToast, showUsageLimitToast, showSubscriptionToast } from '../utils/toastNotifications';
-import { shouldSkipOnboarding } from '../utils/demoMode';
 
 export interface SubscriptionLimits {
   gemini_calls: number;
@@ -547,26 +546,6 @@ export const SubscriptionProvider: React.FC<SubscriptionProviderProps> = ({ chil
 
   useEffect(() => {
     // Check subscription on mount
-    // In demo mode, skip subscription check and allow access
-    if (shouldSkipOnboarding()) {
-      console.log('SubscriptionContext: Demo mode - skipping subscription check');
-      // Set a mock subscription to allow access in demo mode
-      setSubscription({
-        id: 'demo-subscription',
-        plan: 'demo',
-        tier: 'demo',
-        active: true,
-        billing_cycle: 'monthly',
-        api_calls_used: 0,
-        api_calls_limit: 999999,
-        current_period_end: new Date(Date.now() + 30 * 24 * 60 * 60 * 1000).toISOString(),
-        features: [],
-        status: 'active',
-      });
-      setLoading(false);
-      return;
-    }
-    
     checkSubscription();
 
     // Set up periodic refresh (every 5 minutes)